Malicious PDF — malware analysis report

Static analysis result for SHA-256 0730940ad216f807…

MALICIOUS

PDF

73.2 KB Created: 2021-02-02 07:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6f5c97c5107ce1c4e8c5c49b7bd8f883 SHA-1: 0674a21be1b9e08442f5e586f455036318dde0af SHA-256: 0730940ad216f807e3336f7fafb26a91c4428689ae07608daaf256494b3b7632
196 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are algorithmically generated and hosted on suspicious domains, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The document body, though heavily obfuscated, suggests a lure related to a 'Baumer pressure transmitter manual'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://jacksth.ru/aws?utm_term=baumer+pressure+transmitter+manual PDF link annotation
    • https://cdn.sqhk.co/sabimejuka/cohhdhh/tovovufololukuzu.pdfIn PDF document text
    • http://privateguardingserviceagainstdanger.site/pfsense_install_guideg2gtn.pdfIn PDF document text
    • https://cdn.sqhk.co/fefuxumito/oUfhiia/pogolemosa.pdfIn PDF document text
    • https://befapoge.weebly.com/uploads/1/3/1/6/131637854/8472681.pdfIn PDF document text
    • https://rikekipodoze.weebly.com/uploads/1/3/0/7/130776447/meretus-birezo-jonigalidufatok-topawawuxinab.pdfIn PDF document text
    • http://baugroup.info/27926870340ucuye.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/9jh4T1x/86662828940.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/nVgiFDp/barber_shop_celebrity_fashion_beard_salon_games_2.pdfIn PDF document text
    • https://kuvixirizu.weebly.com/uploads/1/3/0/7/130739951/xexalokij.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/XENvwMh/73656904085.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/3ghJgzQ/hustle_castle_hack_apk_android.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/mutirexa/maplestory_mobile_weapon_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/baidu_pc_faster_portable.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/best_antivirus_free_filehippo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE138 5016 bytes
SHA-256: 4bdbf79145ffb994138f407e19d15bd5c4715dd9b22d2ecc4f7f59c6daa87054
font_01_sfnt_off0000f228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF228 11180 bytes
SHA-256: dbfcc06f45b2710dad084259a6df919effb48ef4681dec86db801151175fd57f

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