Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7517dac52d99acc…

MALICIOUS

PDF

82.0 KB Created: 2021-04-01 06:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3213285954e9b8164e1e99d7948b2d10 SHA-1: 7bd335de77c0660b2e4e243fcd7ba690854969d2 SHA-256: a7517dac52d99acc32170a7c8f18be25e50e8e8f62e698d1b6662ff048bdd377
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. One of these URLs, 'https://botokaw.ru/123?utm_term=ardaas+karan+punjabi+movie', is embedded within the document's text, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further confirm its malicious nature, likely related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://botokaw.ru/123?utm_term=ardaas+karan+punjabi+movie
    • https://cdn.sqhk.co/pubamegumox/eggBzw7/30215223657.pdf
    • http://mitatizizuje.mypressonline.com/kotazuwajurufurewalosigug.pdf
    • https://kexazupaxi.weebly.com/uploads/1/3/3/9/133997339/sakifila.pdf
    • https://cdn.sqhk.co/susononuz/hgcVjfY/video_player_with_subtitles_download_for_mac.pdf
    • http://jabudapitu.scienceontheweb.net/cover_letter_for_internship_application.pdf
    • http://xegisepereti.mygamesonline.org/nanolarekufuxofu.pdf
    • https://cdn.sqhk.co/bojojiweg/hbifvjj/69764124696.pdf
    • https://lumekagaxegi.weebly.com/uploads/1/3/2/7/132712489/3426046.pdf
    • https://puwedogomep.weebly.com/uploads/1/3/1/3/131382223/5515405.pdf
    • https://cdn.sqhk.co/jutafegobexe/Fichdie/nafowejowabepuletepojiw.pdf
    • https://cdn.sqhk.co/kupejabel/99lVijh/limezejasaxix.pdf
    • https://mokomowu.weebly.com/uploads/1/3/5/9/135969792/tarivaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/waduzirader/python_dictionary_append_value_to_list.pdf
    • https://s3.amazonaws.com/jifedefujodu/48461630930.pdf
    • https://s3.amazonaws.com/regufojalojaza/folerojasefaxuvuto.pdf
    • https://s3.amazonaws.com/woxotopapozokev/doviwakemevol.pdf
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_d0099ca744d44f3b9d4732903b05d189.pdf?index=true
    • https://s3.amazonaws.com/likerajatob/baritone_minecraft_1._14.pdf
    • http://xologikaju.atwebpages.com/nesupituzamukubipetiwuboj.pdf
    • https://87d5e434-dc39-4d64-8681-877d64e204d5.filesusr.com/ugd/5660ac_39d1216f345449d3a93f25eeb83c5901.pdf?index=true
    • https://c779a0a5-5a96-4308-8c37-720837e0bdd2.filesusr.com/ugd/4f1d02_b2e4c873236a431792509c59b3af4808.pdf?index=true
    • https://s3.amazonaws.com/pazatuv/73073929471.pdf
    • https://s3.amazonaws.com/tenunud/29763554017.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e6.bin
cceabaf7dc3baee2d682064a254fa48509a6dd76c3feeaae9a39c09932564fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E6 5404 bytes
font_01_sfnt_off0000fc33.bin
e0b108f4396e8941942907fec032a2621ea7d8c122277bd3fdd961cb430bd8d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC33 12244 bytes
font_02_sfnt_off00012543.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12543 16164 bytes

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