Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a54f72bbc161e1…

MALICIOUS

PDF

88.4 KB Created: 2021-03-14 16:32:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: af035be6f330a092358e0901d5dbe808 SHA-1: 2260fec8de9162364d9ba8b08baa1b5d43f9a70a SHA-256: 96a54f72bbc161e151152b04b6bcbc72aa22e8c76e68c0ee1261c43fbe934a9f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to attract search engine traffic. One of the primary URLs, 'https://nipisod.ru/award?keyword=aldehydes+and+ketones+pdf+download', appears to be a malicious domain. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 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://nipisod.ru/award?keyword=aldehydes+and+ketones+pdf+download PDF link annotation
    • https://pipabujul.weebly.com/uploads/1/3/2/6/132680817/9016760.pdfIn PDF document text
    • https://jugatevos.weebly.com/uploads/1/3/5/3/135344520/e4b95187.pdfIn PDF document text
    • https://nimaxosonoj.weebly.com/uploads/1/3/4/8/134897368/8151711.pdfIn PDF document text
    • https://lipijubirenazob.weebly.com/uploads/1/3/4/7/134722159/2a869.pdfIn PDF document text
    • http://thailandlove.site/bikedetitewefaxilasukyk6ht.pdfIn PDF document text
    • http://mini-camera-super.club/93079408396vst4t.pdfIn PDF document text
    • http://ehaberdevlet.com/30164968894s2dpw.pdfIn PDF document text
    • http://tlgfree.xyz/azimuthal_quantum_numberopoc1.pdfIn PDF document text
    • https://poduxerot.weebly.com/uploads/1/3/0/7/130776630/tonokutafusola.pdfIn PDF document text
    • http://omoikiri.info/magnus_chase_hammer_of_thor_read_online_freelu0m2.pdfIn PDF document text
    • http://habercigo.com/lixavodwtkx.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/karma_khushwant_singhl6m1m.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
    • https://uploads.strikinglycdn.com/files/19c4b8b3-f0ae-4001-b460-0a54cc4192bb/milafukod.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/punotulo.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/distinctly_home_egyptian_cotton_sheet_set.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/69270043591.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/boost_your_vocabulary_2.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/gesesaraviwafegugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/427aaaff-3fa9-43eb-b974-81e0ea32aa77/maxitunopivinotetewe.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/jitterbug_cell_phone_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/pamopalunimawaxetufanob.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/vuvirasigusidapuvunuf.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/pogar.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF656 5020 bytes
SHA-256: ab70fdc8e065b81b529b407626993e542d975295ac59e010a3f6a519103607e5
font_01_sfnt_off00010777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10777 5940 bytes
SHA-256: ac7ed88eade1d99aaa6fcafd5e01b892ba0ff02014d707efa9fb1c9afb13caf2
font_02_sfnt_off00011dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAD 11932 bytes
SHA-256: d03b4ca5bdfc4e57a9c39d0847a6ff94340bbc390ee957811d65ec1730751bed
font_03_sfnt_off00014588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14588 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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