Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc3575e811b564b1…

MALICIOUS

PDF

93.8 KB Created: 2021-01-10 18:16:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3c0c03b25be9056c12df67ecbf17c22e SHA-1: 9576b74b69c3fdccaea9f7253ecf6b9b89eb9c52 SHA-256: cc3575e811b564b10847ad13db3a85a701e1b66cf662497260bdd5af15321da6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a likely attempt to redirect users to malicious sites. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafficel.ru/aws?utm_term=karthika+deepam+serial PDF link annotation
    • https://site-1175676.mozfiles.com/files/1175676/kefet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5f92f543aa011.pdfIn PDF document text
    • https://site-1173288.mozfiles.com/files/1173288/ls7_engine_valve_guide_wear.pdfIn PDF document text
    • https://rabofabi.weebly.com/uploads/1/3/0/8/130813834/pasegakazewerup.pdfIn PDF document text
    • https://site-1176572.mozfiles.com/files/1176572/fadizulajizaruwizope.pdfIn PDF document text
    • https://site-1175507.mozfiles.com/files/1175507/89599963471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5fd5f41beb0db.pdfIn PDF document text
    • https://nalokulomegeze.weebly.com/uploads/1/3/4/7/134758193/e617bfb22bb8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/gipemo.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/white_pages_waco_tx.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B4 5232 bytes
SHA-256: 695609503a567a237e8742a14aaacaba80a2951e6c1f46367785fb8356a001ba
font_01_sfnt_off0001024d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024D 3852 bytes
SHA-256: 13ba48a72401ce36cbffdcf362b705b7c5e8556bd709e4c7c54c6a68d614690f
font_02_sfnt_off00010f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F78 3220 bytes
SHA-256: 289378a1098ab536b903231b35180ce45035c8cc0472cf4139fa2e082ed95ea8
font_03_sfnt_off00011bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD2 2960 bytes
SHA-256: 8bdd720afac0e5bd67243d8855c945f2c323eed30239d440ab0480f2d5f20e62
font_04_sfnt_off00012848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12848 2928 bytes
SHA-256: 58726f697bcfb71ea1108f6bbc23b5ff42c98ec37b47e655b8942ba617eb31b7
font_05_sfnt_off000134d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D0 10452 bytes
SHA-256: 4acc9ecdd851bee99c016e50942e9ef3f28920a0fa9514cae1b2b50ef50013fb
font_06_sfnt_off000158f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158F7 4240 bytes
SHA-256: 55daa8058d4dedddc5042592533cc36549d5690f1b637fe1db5234a209aa3c6d

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