Malicious PDF — malware analysis report

Static analysis result for SHA-256 2094a964baba80a8…

MALICIOUS

PDF

75.6 KB Created: 2021-03-16 20:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 003e0a8b52b2f8c9dbfaba4152fe456a SHA-1: b38e6d777478c088e2a41ebe550830a207942aa5 SHA-256: 2094a964baba80a8c65b84a69e3eee2850199f851b201fdaff26e99de71f041f
186 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external URLs, many hosted on disposable domains, indicating a likely attempt to manipulate search engine results or redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/strik?utm_term=how+does+a+water+heater+switch+work PDF link annotation
    • https://cdn.sqhk.co/kasavakujosi/jeTeRge/domino_game_app_reviews.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/how_many_nuclear_power_plants_have_been_shut_down_in_the_us.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/magic_tree_house_merlin_missions_books_1-4_boxed_set.pdfIn PDF document text
    • http://nomevufaneboja.mypressonline.com/the_man_in_the_high_castle_ending_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxegejedak/gcRig55/vifesidikugunuzinapez.pdfIn PDF document text
    • https://cdn.sqhk.co/nizekidido/ib2boVH/kajojobufotufakagobexepo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pubejasebalodo.rf.gd/829987944.pdfIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_30de46070b3948979ca3d03f366c1b09.pdf?index=trueIn PDF document text
    • https://d668ac4b-7052-46b9-8d0c-7e282d24ced7.filesusr.com/ugd/00fc84_03b6c15c8df84a13838a6bf2a908e00c.pdf?index=trueIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_961d461cf2f941d38034b35b41b0d4a3.pdf?index=trueIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_e1d8f892a2344d82b5b94572a8e92414.pdf?index=trueIn PDF document text
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_958fb16291324be9bc1e5e8674d1b0b4.pdf?index=trueIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_51ed96eff0e345b0b3ee4706794ebeec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/94441918899.pdfIn PDF document text
    • https://5c09c65f-4728-49e3-9562-8692e696fc4f.filesusr.com/ugd/32acb1_00ecda841b904cca8c6fbc607640365d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/zanixemigepumeroroken.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_a20a60c7432749a398ba30ec040fd219.pdf?index=trueIn PDF document text
    • http://bolozenafo.rf.gd/53757563067.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/beauty_and_the_beast_in_isaimini.pdfIn PDF document text
    • http://dusetelonuzaj.epizy.com/formcontrol_vs_formgroup.pdfIn PDF document text
    • http://simavanexija.rf.gd/business_apology_letter_to_customer_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/juxudewumuviwozo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF7 4792 bytes
SHA-256: 0842b20c3497fe02c5514aa3cbb197f4c2cef7a0c8e5bd90f16248a5a7e0eae9
font_01_sfnt_off0000ec65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC65 11268 bytes
SHA-256: e67c2a3b52415f46b5693298cbfc58a90cf59b78cf7fb3415c3337a355c6edd2
font_02_sfnt_off0001126f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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