Malicious PDF — malware analysis report

Static analysis result for SHA-256 f402aa9e702d34aa…

MALICIOUS

PDF

90.5 KB Created: 2021-04-06 21:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e56a253d83cf2a1eaef0f28cc44fb7d3 SHA-1: bc7cfe80f31c05abf0fe0b2eb969c3ed7213c48f SHA-256: f402aa9e702d34aa0f75d8648fbdd74512d38801c885da1092b3f9a93d279192
196 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, including language related to lotteries, prizes, and parcel delivery. It contains a significant number of external links, with one pointing to 'https://zajinet.ru/strik?utm_term=android+app+development+cost' and another to 'https://detawokigar.weebly.com/uploads/1/3/1/4/131453745/bofurasubebemafixe.pdf', suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://zajinet.ru/strik?utm_term=android+app+development+cost
    • https://detawokigar.weebly.com/uploads/1/3/1/4/131453745/bofurasubebemafixe.pdf
    • https://xisudujerixaxir.weebly.com/uploads/1/3/4/5/134583325/xezelemiluvan_leragejagu_janodaliju_fuzatudatibil.pdf
    • https://cdn.sqhk.co/zegetaru/bhjrig6/head_soccer_championship_2014.pdf
    • https://cdn.sqhk.co/felolavap/SJgfigi/leteribuxoviwudurut.pdf
    • http://gusitolife.iblogger.org/88552048150.pdf
    • https://mewukonil.weebly.com/uploads/1/3/4/0/134096476/vebubezimikilenurev.pdf
    • https://cdn.sqhk.co/mivijigonof/fLggidn/8459940446.pdf
    • https://rogusedi.weebly.com/uploads/1/3/4/4/134433103/ranuruzalekid.pdf
    • https://nobaletakalesig.weebly.com/uploads/1/3/2/3/132302751/gamomizujijuro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/05fd7f54-73a4-4e9e-bc4a-d270ade3211d/cuisinart_pro_custom_11_model_number.pdf
    • http://regipikiwubadov.epizy.com/despacito_song_djpunjab.pdf
    • https://uploads.strikinglycdn.com/files/913294b8-3664-4698-b0e6-63a47bbd0d8e/27979790886.pdf
    • https://uploads.strikinglycdn.com/files/fad8672b-8dd0-461c-bbc3-d1414ee48e35/what_to_wear_on_a_dress_down_day_at_work.pdf
    • https://uploads.strikinglycdn.com/files/79fa5404-34e0-4805-8530-cb2c3e81965b/tirekidatuw.pdf
    • https://uploads.strikinglycdn.com/files/c3244815-5447-45ba-922d-51ae33d2002b/39175408227.pdf
    • https://uploads.strikinglycdn.com/files/9043bd50-8caa-4f42-860b-f42b5c4db38a/the_man_in_the_high_castle_season_2_episode_9_cast.pdf
    • https://uploads.strikinglycdn.com/files/ab7f622d-a771-4d39-88c5-7c770c2c85bf/how_long_is_each_episode_of_death_note.pdf
    • http://gudagugagazof.rf.gd/banal_nationalism_billig.pdf
    • http://dekixugo.epizy.com/95912175550.pdf
    • http://gigapenawer.rf.gd/reviews_sunbeam_mixmaster.pdf
    • https://uploads.strikinglycdn.com/files/8ee2017f-581a-4834-ba24-190db977e5fb/subakadexibitibe.pdf
    • https://s3.amazonaws.com/kovilowab/mat-_datepicker_format_dd_mm_yyyy.pdf
    • https://uploads.strikinglycdn.com/files/16c592cc-754b-4739-b545-3238d6258c31/how_to_change_battery_in_brk_670mbx_smoke_alarm.pdf
    • https://s3.amazonaws.com/xesigeze/wafamalitirebigekuvi.pdf
    • https://s3.amazonaws.com/fajixe/how_to_evaluate_sentiment_analysis.pdf
    • https://uploads.strikinglycdn.com/files/949b3527-86b5-4ff6-bb82-8bbfd9390f8e/juwimobegaw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001219a.bin
851168032b038a69bcb9f871f9a2cbf9eb81aa12f594db994a53d73718200bc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1219A 5268 bytes
font_01_sfnt_off00013371.bin
1288de4794c4dece29edac06666c6dc6fc6d803efe6900d82ceb26a00fc3f1d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13371 12104 bytes