Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a01df1d60c2bee…

MALICIOUS

PDF

85.3 KB Created: 2021-03-24 06:26:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ddd69a53cfce392bbe49d7000a688d12 SHA-1: 55892586b5c47dfbc6da31d343a29caa7f2d2224 SHA-256: e3a01df1d60c2beec46f9d6e0abeb4815e8912df5d84f5e646a092181396035e
186 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 0.9998

Heuristics 6

  • 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.
  • 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://maypoin.ru/award?keyword=bone+broth+diet+plan+pdf PDF link annotation
    • http://navizuvexax.iblogger.org/is_the_s10_bigger_than_the_s9.pdfIn PDF document text
    • https://dotofufodil.weebly.com/uploads/1/3/5/3/135313806/9245290.pdfIn PDF document text
    • https://cdn.sqhk.co/sikudile/ghPlFlT/stockyards_hotel_celebrity_suite.pdfIn PDF document text
    • https://cdn.sqhk.co/zirizowesaw/hfgeYgl/sajisabopadedapogenu.pdfIn PDF document text
    • https://dinelelulom.weebly.com/uploads/1/3/4/3/134308509/7449361.pdfIn PDF document text
    • https://cdn.sqhk.co/korebuxaguz/dpVTwkf/11896939454.pdfIn PDF document text
    • http://jakesubinosol.scienceontheweb.net/plan_unico_de_cuentas_colombia_en_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/bVYBAEc/68175364527.pdfIn PDF document text
    • https://satepiwe.weebly.com/uploads/1/3/5/3/135350267/wexuzedobug.pdfIn PDF document text
    • https://tupisefam.weebly.com/uploads/1/3/1/3/131383837/81e62489a2f693d.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://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_589d7108cbdd49b5823c908be51e045c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d655250-b08a-4869-884a-e6eba79c3bc8/puwupozepuvuxarubimug.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/how_to_get_gamestop_coupons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73da8c0a-023f-4f05-960f-82bf42f2f925/dutifepuzemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f4cb7ca-6892-4fbd-86a9-34887a5264b7/17319171134.pdfIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_87fd8d5c32e84317b3f2555611f4d382.pdf?index=trueIn PDF document text
    • https://b27aca93-056c-4dd2-83a6-fd909c9f709d.filesusr.com/ugd/2ba3ac_297bc6f6ce694cf1ad6b2110dd26d5a6.pdf?index=trueIn PDF document text
    • http://zowofiz.myartsonline.com/what_jobs_can_you_get_if_you_study_international_business.pdfIn PDF document text
    • http://gixisenusadat.rf.gd/amazon_ec2_cloud_computing.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_off00010554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10554 4928 bytes
SHA-256: b5611a400274f7ae8b71a7b4e71c7550523e784ff44a69afee6e7d1440234eb5
font_01_sfnt_off000115fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FE 10512 bytes
SHA-256: b708440a158b64068d2f0d97a4822e6e5518daab8fe394a54faa3b0ee5ac6bdd
font_02_sfnt_off000139ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139FF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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