Malicious PDF — malware analysis report

Static analysis result for SHA-256 981cda0f00e2c546…

MALICIOUS

PDF

80.8 KB Created: 2021-04-03 06:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dc99d969d13ff989340d50360f802b0c SHA-1: 10fb7d216b4cfd87416534645cd1e9bf81fc34b9 SHA-256: 981cda0f00e2c546ac07928c7bde1343648678bf1866299cefd576178c15f296
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=the+passage+justin+cronin+synopsis PDF link annotation
    • https://jezafemobad.weebly.com/uploads/1/3/1/3/131383748/5694777.pdfIn PDF document text
    • https://tamamola.weebly.com/uploads/1/3/4/6/134690119/zowebasimor_nanofa.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/muxuwes.pdfIn PDF document text
    • https://volokosebu.weebly.com/uploads/1/3/4/8/134871595/komumi_kunewironume_suvotap_gejovife.pdfIn PDF document text
    • https://virataxutepubom.weebly.com/uploads/1/3/0/8/130874282/rinesufugitob.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/dusulaw.pdfIn PDF document text
    • https://ginijamuda.weebly.com/uploads/1/3/1/4/131409148/fivod.pdfIn PDF document text
    • https://pasirukeb.weebly.com/uploads/1/3/4/0/134017476/7db5a2.pdfIn PDF document text
    • https://kifakofaw.weebly.com/uploads/1/3/4/0/134016777/wojunamuxotoniwa.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://s3.amazonaws.com/zukogi/dolezodasoxuvirazubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/472f32b5-0e94-43e0-ba8f-fe4f46948d17/53951028620.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/gopaviwazidimile.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/88765560684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/211fa69a-244f-412e-b2fe-9751a520db01/6652289218.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/32009301779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a56e9777-60a8-4074-a240-5332f40fd229/how_to_adjust_an_unloader_valve_on_a_pressure_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/bitemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8deb301f-025b-423e-9d2b-f7e25ff5402d/ge_cafe_gas_range_reviews_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc06b0f0-4d15-48e0-9af7-17ad83bcab97/princess_bedtime_stories_to_read_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53b4f52-605f-4c75-9424-b4af3152c57b/7864534161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1625c2c8-47c6-435a-a086-cabcfab6d205/how_to_use_magic_chef_rv_oven.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/487455985.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EE 5172 bytes
SHA-256: 67216acf2a9209e6db6179568b6ef0f36c29461f964b9d386196ecbb9fb3efc2
font_01_sfnt_off0001048d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048D 10232 bytes
SHA-256: 047d6c1901ee46a9d2a8bb8314e8aeeed8e407ca0e2e08793d3f11d70d237ca2
font_02_sfnt_off00012799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12799 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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