Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c1cf6bd988aef3…

MALICIOUS

PDF

76.6 KB Created: 2021-03-15 22:37:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ba69b7eca8ca46a00c8a4f4696549274 SHA-1: 9bd438524ae305966ad542e23a000a77364c2b31 SHA-256: 44c1cf6bd988aef3850e314ad9e9cea93ebd05926812d48a9f9b1d93111e630d
126 Risk Score

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 0.9998

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://jacksth.ru/wix?keyword=pokemon+ranger+action+replay+codes PDF link annotation
    • https://cdn.sqhk.co/zofizitene/7Dr1WCK/rugomubidebufu.pdfIn PDF document text
    • http://taygerr.com/osmosis_and_tonicity_worksheet3kfq0.pdfIn PDF document text
    • http://crysety.xyz/how_to_download_diversity_3nca2o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_601a0a7b00c94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466166/normal_60051d937cf49.pdfIn PDF document text
    • https://cdn.sqhk.co/manoxixo/ojigpSS/father_and_son_quotes_bible.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/e1HEJhh/chicken_gun_mod_apk_1._7._7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485299/normal_602f9aa727d1d.pdfIn PDF document text
    • http://bepofikoguja.22web.org/20320110004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462339/normal_604412a5d55ab.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/hggc9gh/clash_of_clans_dragon_s_lair_goblin_map.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477886/normal_602123922b737.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://fexotupakel.rf.gd/free_printable_emotion_picture_cards.pdfIn PDF document text
    • http://vuvazapej.rf.gd/hbse_open_form_online_2019_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee0c84f-7a3b-4fd7-856d-31046e41f647/does_t_mobile_have_a_signal_booster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bab4b72-9e30-4fdd-ad3e-f1dd6d00438c/kyocera_fs-3140_mfp_service_manual.pdfIn PDF document text
    • http://dutijut.epizy.com/norton_safe_search_toolbar_for_google_chrome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b5ddc3b-afad-462b-9d96-ca59fb811d49/subikavo.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_off0000e0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FE 5348 bytes
SHA-256: 1615b021cfb83f90be056b6f319e46edfc5d92aed07d7087ae72417e91a4598a
font_01_sfnt_off0000f312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF312 10620 bytes
SHA-256: 94290ac60dd51140b504f79f43109c74303ef76cb5ece0dd2aeee4b75612f731
font_02_sfnt_off0001175c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2