Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7fde1c25ceb60f…

MALICIOUS

PDF

84.4 KB Created: 2021-03-18 03:27:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 79f293efed1f9b136f64ba72a3c91918 SHA-1: e5e0cc4db68d4b1fcfd0c04c878ca88a807c6ffb SHA-256: 9d7fde1c25ceb60f31db6fb01dd6d37ef41ac37a8561d60b36985aaecc73d183
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to suspicious or disposable domains, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the link farm suggests it's designed to lead users to malicious sites or for SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/wix?keyword=meg+tirrell+images PDF link annotation
    • https://lezevonunibo.weebly.com/uploads/1/3/4/5/134577944/9a693127.pdfIn PDF document text
    • http://nitodizej.22web.org/matudej.pdfIn PDF document text
    • https://wekigenajelu.weebly.com/uploads/1/3/3/9/133999196/8214534.pdfIn PDF document text
    • http://ligorowimilupux.22web.org/the_little_engine_that_could_book.pdfIn PDF document text
    • http://ferobuxanax.iblogger.org/bipozemabuxodogiresuxela.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/kosexogipakubaji.pdfIn PDF document text
    • https://pegutezupo.weebly.com/uploads/1/3/2/7/132740329/1208993.pdfIn PDF document text
    • https://teriwogawuf.weebly.com/uploads/1/3/2/8/132815342/nidilimu.pdfIn PDF document text
    • http://raruvutemogogog.iblogger.org/77819451604.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
    • https://uploads.strikinglycdn.com/files/2c6daf9c-fe32-4747-931a-14603fa29764/the_new_case_for_gold_book.pdfIn PDF document text
    • http://kagumaxapa.rf.gd/bass_boost_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dae7e6b2-eb7f-4bf2-8ed1-3e4200286ba0/50129749255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86c19b74-5289-4dbb-86dd-e3de59a4aafa/41095746737.pdfIn PDF document text
    • http://pojetol.epizy.com/38595108726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1063a983-29b0-43fb-9360-9cf13249a7f1/how_to_add_star_rating_in_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdb90ac2-6cdf-4b09-95ba-beb6464c9347/sesag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65cfa25a-a33b-4819-94dc-0f345d359ad6/what_is_the_origin_of_etymology.pdfIn PDF document text
    • http://kinowazekuponaw.rf.gd/88231748249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c28f9e10-1cc9-4084-beb7-de12e7261b30/food_safety_standards_act.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c5f5116-b74a-43b4-abfb-6e051f9de8d4/how_to_get_rid_of_a_cyst_pimple_on_face.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a82a7fe3-0ebc-440f-bbc9-d888523790d0/sarah_dessen_movie_how_to_deal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/126421e4-9a39-4c52-9d91-d043ee79d531/computer_accessories_shop_near_me_open_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53f0707a-b42e-4639-af9f-0258b0e83887/craftsman_27cc_speed_start_gas_trimmer_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8b06284-5b5e-4550-b7ec-f137918f51ae/14944569887.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10080 4584 bytes
SHA-256: cc90dd81307b6d4eab175b629d16fe873ee70091b865484ba10703aae0ce6422
font_01_sfnt_off0001100e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100E 11284 bytes
SHA-256: 50024e58dcb30202d4eaa3a8fd7138d0723044a29bca16288a1451b069f344a7
font_02_sfnt_off0001364d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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