Malicious PDF — malware analysis report

Static analysis result for SHA-256 98fe0aa6559e15cc…

MALICIOUS

PDF

84.2 KB Created: 2021-06-10 23:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3023f89efc11abcbf8a150084937b559 SHA-1: 51e055d6c54133104e1db03f2b285b4cb1f69a05 SHA-256: 98fe0aa6559e15cc02ccdb5a1cec1584dd1edea03aed125d7f4e0ad0d703790c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified as a link farm, with a primary suspicious URL pointing to a site that appears to be involved in SEO manipulation or potentially distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the link farm suggests an attempt to redirect users to malicious content, aligning with phishing or content abuse tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crysiq.ru/pbw?utm_term=shree+siddhivinayak+mantra+and+aarti+download PDF link annotation
    • https://nizidisifa.weebly.com/uploads/1/3/4/5/134505067/1650858.pdfIn PDF document text
    • https://kevefizi.weebly.com/uploads/1/3/1/8/131871405/c6b6c006.pdfIn PDF document text
    • https://moremutinujiti.weebly.com/uploads/1/3/4/8/134865562/d688e792fc3.pdfIn PDF document text
    • https://gumagujex.weebly.com/uploads/1/3/5/3/135309175/visenafuki_momitin_norifabof.pdfIn PDF document text
    • https://sujabowumosof.weebly.com/uploads/1/3/1/3/131398195/xurujam.pdfIn PDF document text
    • https://munivimisidifi.weebly.com/uploads/1/3/4/7/134772296/dilabetugeka-rewifomuna-divame-lukelumu.pdfIn PDF document text
    • https://metidesu.weebly.com/uploads/1/3/4/4/134492072/dusanapexeko-meperopetigu-refizizusizab-xikite.pdfIn PDF document text
    • https://retagavit.weebly.com/uploads/1/3/4/3/134363188/warufagagipowokaza.pdfIn PDF document text
    • https://nagugopusoz.weebly.com/uploads/1/3/4/6/134645600/dudizukizenedu.pdfIn PDF document text
    • https://remoruputudedux.weebly.com/uploads/1/3/4/0/134017090/1511708.pdfIn PDF document text
    • https://jotopivazujofid.weebly.com/uploads/1/3/4/8/134881135/fejavedavebegimuzud.pdfIn PDF document text
    • https://rategojo.weebly.com/uploads/1/3/0/7/130739688/2524848.pdfIn PDF document text
    • https://nusazipupuw.weebly.com/uploads/1/3/4/0/134042511/woxorefovi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tugewuvog.pbworks.com/w/file/fetch/144618345/farotaxomefuxadetolajafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cba20fe7-f1cb-4555-b827-edc08a10faa4/marbury_vs_madison_significance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36261f9c-baae-4ba4-9f9d-333a74557a8c/how_to_edit_chart_of_accounts_in_quickbooks_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8667034-4fa2-4f2b-98d3-ac34d1cf250c/sdcafiine_smash_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a10f415b-df71-4d18-af53-c363934f02f4/relative_units_define_a_font_size_using_one_of_five_standard_units_of_measurement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ce34427-a153-4129-92e3-5fc58d0c256b/73631742168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2beba18-5f55-49f5-ba41-e71d0f35d416/76867176839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf8313f-4f47-441c-b518-74fe871d7c7d/the_psychology_of_winning_book_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5142846-6d8d-4a8e-9f18-6db2c68633a9/what_is_the_seventh_harry_potter_movie_rated.pdfIn PDF document text
    • http://lajunola.pbworks.com/f/david_myers_social_psychology_10th_edition.pdfIn PDF document text
    • http://tefesabiji.pbworks.com/w/file/fetch/144943746/january_bible_reading_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7afd38a6-1989-4fc3-a0dc-62ceef1d46d8/printable_stress_test_for_college_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41e9dfda-e6c9-4924-98a3-c7d3929a3381/53325382270.pdfIn PDF document text
    • http://jiboduxoguv.pbworks.com/w/file/fetch/144843048/what_does_ticonderoga_mean.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CE 5484 bytes
SHA-256: 3390d8cdcc6156f8efbcfbc4cad58ec625e9756b2395684c4c2ec0eb2d24d60b
font_01_sfnt_off0000fb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5F 11844 bytes
SHA-256: 9a5525ce91fcdc6357c3c62661c0c051e6c7194d519ea2cf732ad0267b97cb9e
font_02_sfnt_off00012409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12409 18776 bytes
SHA-256: 001d00114279cda904ec87ee5caf81ece5266ef333c342f0ca5ce216f4908131

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