Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e60f1d1e6cfa28…

MALICIOUS

PDF

74.8 KB Created: 2021-04-19 07:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 50e876b44609522eaf5e6a092f317edc SHA-1: e64b78bea5c84314937822619c00a153ab2b5c27 SHA-256: c7e60f1d1e6cfa289fdeeadf7a434fbb492973b84c89f9917c89ffd89bddfceb
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO poisoning tactic. The embedded URL 'https://golowaki.ru/strik?utm_term=what+are+the+codes+for+sony+tv' is presented as a search result, likely to trick users into visiting a malicious site. ClamAV detection as 'Pdf.Phishing.Trojan' further supports malicious intent. No scripts were extracted, but the overall structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/strik?utm_term=what+are+the+codes+for+sony+tv PDF link annotation
    • http://shop-onlain.fun/firepower_2110_upgrade_guideaxvly.pdfIn PDF document text
    • http://mofemaruwek.sportsontheweb.net/anglomaniacy_clothes.pdfIn PDF document text
    • http://vevapefin.sportsontheweb.net/cracking_toefl_ibt_free.pdfIn PDF document text
    • http://esclub.pro/85994085453fyo7c.pdfIn PDF document text
    • http://maturibcgj.space/2846124678a44aq.pdfIn PDF document text
    • http://clientesdkb.com/jack_reacher_books_best_to_worstw9guf.pdfIn PDF document text
    • http://1xbet-regi.site/how_to_adjust_throttle_cable_on_polaris_snowmobileqppgy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/does_costco_perform_wheel_alignments.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/12402585123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a0f2705-a151-4496-834b-90feff421469/a_clash_of_kings_book_summary.pdfIn PDF document text
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_0469ca7a46d6471f8b159c3555fd7203.pdf?index=trueIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_a51c83b953824a1a8de6add1af6b9475.pdf?index=trueIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_b29a452df0b2424ba24c89e2bafae361.pdf?index=trueIn PDF document text
    • https://907864b8-ab38-4b43-b195-7646ee37c451.filesusr.com/ugd/c4b402_028dda37b18342278f289dbc077e680c.pdf?index=trueIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_750f82d4c5fa4c7aafb88904723a762a.pdf?index=trueIn PDF document text
    • https://cc6d8859-fc08-4100-a073-55b48c5addfc.filesusr.com/ugd/238140_c23df8125d78420e8d16beae8ba815d1.pdf?index=trueIn PDF document text
    • https://3e021c9a-284a-4c54-9ba1-f6d43d4d2ba5.filesusr.com/ugd/a619af_7d61609e064c41bdacd0711727aaee5c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/tasuvunef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9cc8605-9096-4409-9a2a-6dd8ea909feb/a_christmas_carol_abridged_version_for_students.pdfIn PDF document text
    • http://ligujizulogi.atwebpages.com/brasart_hct_bula.pdfIn PDF document text
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_f8f911d6946240fbb0be56358334e383.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b778c560-a2be-41da-be54-42336ed4d843/what_is_100_day_plan.pdfIn PDF document text
    • https://5b0ea1c3-b874-41d5-a3cc-49595beb80a6.filesusr.com/ugd/0c63be_8ef1fc20bcf8414483611a9e18ab4666.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/setigafat/93231114990.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DC 5252 bytes
SHA-256: 4a776106269ccc1a2e5c60c068de324db1184fd7b8cac6576b57873b39cb3062
font_01_sfnt_off0000f8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CB 10916 bytes
SHA-256: 7c274d17d4748b37e96b902d5343b7c2f94099b8bbbe052b847ff572286617a0

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