Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f0414b7272e4b6…

MALICIOUS

PDF

94.7 KB Created: 2021-05-31 22:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2af16b37147bcde1473e1c29ec6e0e5d SHA-1: b4851d604aeed350f302fcdf2bd2c0a461425ad6 SHA-256: 63f0414b7272e4b64866a82ee490ef2fef9824886ac4ca4500f7d527c9df257e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The primary URL, https://ponafet.ru/wb?keyword=dirty%20versions%20of%20christmas%20songs%20lyrics, is likely used to distribute malicious content or phish users. ClamAV and ML classifiers also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wb?keyword=dirty%20versions%20of%20christmas%20songs%20lyrics
    • https://pijutizomi.weebly.com/uploads/1/3/4/6/134686964/5588686.pdf
    • https://cdn-cms.f-static.net/uploads/4383806/normal_602801b5edf73.pdf
    • https://wimegipovuxu.weebly.com/uploads/1/3/4/3/134373819/9670967.pdf
    • https://cdn-cms.f-static.net/uploads/4369663/normal_601454aa907e9.pdf
    • https://cdn-cms.f-static.net/uploads/4488807/normal_6044f3da15dd7.pdf
    • https://veretiwuwe.weebly.com/uploads/1/3/1/4/131406621/8050930.pdf
    • https://lemabifi.weebly.com/uploads/1/3/4/3/134319461/12cb9.pdf
    • https://xinuluparos.weebly.com/uploads/1/3/0/9/130969110/ea79295eb76bff.pdf
    • https://monotuwisax.weebly.com/uploads/1/3/4/5/134589760/7990367.pdf
    • https://figiroxofidun.weebly.com/uploads/1/3/0/7/130740151/9c88bf61c.pdf
    • https://jexadafiveti.weebly.com/uploads/1/3/4/7/134765621/2e5ada2883.pdf
    • https://bisubobotikimix.weebly.com/uploads/1/3/1/4/131438323/tovelezabiz-jevumevariv-vibituvitir-nobarevinixifit.pdf
    • https://static.s123-cdn-static.com/uploads/4469349/normal_5ffd6ff3ddcc5.pdf
    • https://kevefizi.weebly.com/uploads/1/3/1/8/131871405/28b632e1a62.pdf
    • https://mamonaxerif.weebly.com/uploads/1/3/5/3/135347384/0ad9527.pdf
    • https://cdn-cms.f-static.net/uploads/4385197/normal_5fd170399bbde.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gulisapil.pbworks.com/f/915835357.pdf
    • https://uploads.strikinglycdn.com/files/cb4f0330-3154-4421-b166-728f5cd57d1c/76273026407.pdf
    • https://uploads.strikinglycdn.com/files/1f7122ab-8c27-4c78-b98a-91c42e591287/33368405194.pdf
    • https://uploads.strikinglycdn.com/files/b3b65de5-f170-4667-804d-5039d42e18c7/can_you_play_games_on_the_ti_84_plus.pdf
    • http://lugozamuxika.pbworks.com/f/how_to_use_push_to_talk_on_discord_mobile_while_playing_games.pdf
    • https://uploads.strikinglycdn.com/files/1382898a-5897-4545-95ac-a7c0e34de112/where_to_watch_fifty_shades_darker_canada_2020.pdf
    • https://uploads.strikinglycdn.com/files/457b413e-201a-4ffb-8a5b-f091a36301cc/microsoft_word_2010_ile_ilgili_test_sorular_ve_cevaplar.pdf
    • http://mumubib.pbworks.com/w/file/fetch/144413343/38456949116.pdf
    • http://lekuzax.pbworks.com/w/file/fetch/144417774/vibusarozemuxi.pdf
    • http://xuruzinijub.pbworks.com/w/file/fetch/144423876/slumdog_millionaire_book_macmillan.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_off00013634.bin
730dde723e6d48db7668f34d99acbf534599f48c4ac308d0633dbcfe4c8629bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13634 5456 bytes
font_01_sfnt_off000148b4.bin
d334c8f3963f962a964b88f2354e287fe9fe6585934e06b0a1dd6d7096a27a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148B4 10552 bytes

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