Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bb660469fe269d…

MALICIOUS

PDF

83.9 KB Created: 2021-04-26 21:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c248cfbf488cace617de3b374a2b41c3 SHA-1: 284d7953fbb891481b55d19e395bb880aafb81fd SHA-256: 74bb660469fe269d1639e9f2c4b00ec90ad60d7693162653d6639975cfa92a74
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'software project planning'. The presence of embedded JavaScript, though not directly analyzed for malicious intent in this report, is a common vector for exploitation in PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://xajibur.ru/strik?utm_term=software+project+planning+in+software+engineering+ppt PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463275/normal_6035e08aa6909.pdfIn PDF document text
    • http://heleogose.online/323534459392831y.pdfIn PDF document text
    • http://erogan-oficial.site/dafobadupu9d86g.pdfIn PDF document text
    • https://cdn.sqhk.co/zolususux/iewic1T/fugawobugo.pdfIn PDF document text
    • http://icub.tech/wakisufozojezubuzopomepbpdee.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/pKWsjcs/mario_odyssey_amiibo_3_pack_best_buy.pdfIn PDF document text
    • http://mazers.fun/remington_700_sps_reviews_ratingsh7oet.pdfIn PDF document text
    • http://pycnidwzxc.info/examples_of_poor_health_and_safety_practices_in_the_workplace7j0x7.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/jhhKWjc/26442603670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455403/normal_6067a43f393cc.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/gejjIhj/wallpaper_hd_4k_iphone_xs_max.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/vofadoloves/xemufatuxoralajalogu.pdfIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_1a6dc4506dfa45ba91601c6481e3369b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/how_do_i_get_a_religious_exemption_for_vaccines_in_nc.pdfIn PDF document text
    • https://108bb973-5399-4bf7-a70e-a18780752cac.filesusr.com/ugd/760a88_a7bf243939d34771a6ecc8342d073cff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pisik/label_template_word_document.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/sijebezasam.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/how_to_relieve_back_pain_scoliosis.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/fusion_360_simulation_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/twilight_2009_full_movie_in_hindi_download_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/51032033972.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/what_are_the_main_features_of_narrative_writing.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_off0001087e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087E 5456 bytes
SHA-256: c3e402500050e22d831bbe0f166971db4922c44f0da89df0747df8ce97a13866
font_01_sfnt_off00011b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B31 10708 bytes
SHA-256: f935a8059359f5821d3305739a26f0947c38405b263cdfc5595380530a28d0b2

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