Malicious PDF — malware analysis report

Static analysis result for SHA-256 017010ab9e4f79b4…

MALICIOUS

PDF

79.7 KB Created: 2021-02-18 11:36:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2e8477348200b4e4860e763c50f66a25 SHA-1: 60d436148392b264ea3673c2a0b9893f5126f3a2 SHA-256: 017010ab9e4f79b45d48b4f9cb22a0f2aa4ad2d542fdbeab2fcb70311285cb41
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://bologen.ru/123?utm_term=how+to+pair+sony+wh-1000xm2+with+iphone PDF link annotation
    • http://shortsomfj.space/62994305555gn9j4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402262/normal_600334e3d8604.pdfIn PDF document text
    • http://fitokapss.xyz/polarity_check_voltage_transformercf65u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475196/normal_600fb1d4f1d19.pdfIn PDF document text
    • http://topemuliras.22web.org/bejewajofivixupagarikotu.pdfIn PDF document text
    • https://cdn.sqhk.co/kawaniroti/Fhxhiif/one_god_in_three_persons_verse.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/Ehjgyib/mogasaxiluxekubij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412773/normal_60257bf18a9bd.pdfIn PDF document text
    • http://egosikenclub.com/icon_store_top_up_free_fire446a9.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/8ShgdP4/oscar_wilde_quotes_funny.pdfIn PDF document text
    • http://cuzinfo.ru/79202668299ya156.pdfIn PDF document text
    • https://jenafowumavadas.weebly.com/uploads/1/3/1/4/131437472/parevufoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_601980d552eb2.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://s3.amazonaws.com/voxulija/christmas_coupon_template_word.pdfIn PDF document text
    • http://liwubujuwu.epizy.com/chhota_bheem_kung_fu_dhamaka_link.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/roxizuwukenunase.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/nsf_collaborators_and_other_affiliations_template_2018.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BB 5396 bytes
SHA-256: c4e28354f8ee0cd8c6cf91675a509e8287d42691bf3f310ed827a1b5b20ea545
font_01_sfnt_off0000e7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F6 10996 bytes
SHA-256: 6b09a0ec9fbf2a3e7e2b79b7447c2126efa62b456c19e4d005e642caae8045b7
font_02_sfnt_off00010d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9F 16344 bytes
SHA-256: ed45a24507f18daeaf6b6e9cac20235e9e43bed88bc2d44b7621eff085e31190
font_03_sfnt_off00012317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12317 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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