Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa354bd477031d6…

MALICIOUS

PDF

72.1 KB Created: 2021-04-08 21:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6c6f24b7f6888ed65f5c0927771035c0 SHA-1: 1173aad6a65a7aa83c3cd77f099485a6d0fc288a SHA-256: cfa354bd477031d65ef74f17d60eb7a5ae7f9ad83c00f5c5805e102731cc59a7
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 0.9997

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://dafemum.ru/strik?utm_term=jeep+tj+rear+quarter+panel+replacement PDF link annotation
    • https://xodozevonewoze.weebly.com/uploads/1/3/1/3/131384462/2787830.pdfIn PDF document text
    • http://bitcoinov.site/how_to_use_audio_on_bible_app4dv1e.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/1780087.pdfIn PDF document text
    • https://kifosaxuwaf.weebly.com/uploads/1/3/4/0/134016965/8157451.pdfIn PDF document text
    • http://filemarker.store/zanawozataxenedulapehw6o5.pdfIn PDF document text
    • https://jopokiwajisi.weebly.com/uploads/1/3/4/1/134108554/dedamol_vatod.pdfIn PDF document text
    • http://tewajaz.iblogger.org/peligro_los_aditivos_alimentarios.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/murudute/what_does_rainforest_smell_like.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a66d2e99-f7b3-431e-8298-e397eb27624a/princess_diaries_3_trailer_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/speaking_of_courage_essay.pdfIn PDF document text
    • http://mibizaw.epizy.com/66811514933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8783066-d3c7-4ff1-bca8-680a710b7edc/value_education_meaning_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/what_is_a_focus_group_discussion_guide.pdfIn PDF document text
    • https://9f1be152-2ea1-4306-981d-bfff62ad382d.filesusr.com/ugd/08fb22_02e2df5624b342ecb5d4e653262a34fe.pdf?index=trueIn PDF document text
    • http://dagaratula.rf.gd/24370442436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9b7dbe4-0721-4318-8242-460ff304b7b8/synthesis_essay_example_topics.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/48112082062.pdfIn PDF document text
    • http://fifofiboveligaf.rf.gd/water_animals_list.pdfIn PDF document text
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_32fb96bb7aa840c09d1a40ef5b881e59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadedosi/nonumeruluzumema.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9B 3952 bytes
SHA-256: bf388e11c4c06f925a41957f21083ade396f29185a190973539178537c6c0943
font_01_sfnt_off0000daa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA8 5092 bytes
SHA-256: 3985f47c74975d0218da978ae9ee27beacca14b82ac50466fc14d43cfcc88079
font_02_sfnt_off0000ebf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF1 11416 bytes
SHA-256: 501f0fdd618bdb0bc00b9639aa8780447b5ec3274261d237de26f167ca5ca5c1

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