Malicious PDF — malware analysis report

Static analysis result for SHA-256 e255779b158704f4…

MALICIOUS

PDF

93.6 KB Created: 2021-04-05 04:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0ead1d7a72fae9f958b056af386a659 SHA-1: 39e36398fd392017ed42e42e000e0985e2733900 SHA-256: e255779b158704f48bf6133269938b642bd319b3326af749d0a3a4a7ad5e9933
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to Weebly and other domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=note+taking+guide+episode+1001+answers
    • https://ravikuzisuwu.weebly.com/uploads/1/3/4/4/134470025/bd66763.pdf
    • https://gomujivas.weebly.com/uploads/1/3/5/3/135321586/lizonefoviwomopijox.pdf
    • http://idealica-uficialeitalia.website/11th_physics_book_answer_key_20207v3uh.pdf
    • http://bigno.space/77798598637idwgn.pdf
    • https://loxoxonejuk.weebly.com/uploads/1/3/4/6/134684666/womijuxasulinu_befigewevox_nokokoporarodil_roliwefonanalol.pdf
    • https://nirejabepifu.weebly.com/uploads/1/3/4/2/134266024/d2d666ba79e11f.pdf
    • https://cdn.sqhk.co/zupuguvawaj/TPmEr5F/suvuxesiwabi.pdf
    • https://rojogibolodo.weebly.com/uploads/1/3/0/7/130775817/4777112.pdf
    • http://7gusevshop.space/lekejutesitorol9njbf.pdf
    • http://stnold.com/73794884897wgfwa.pdf
    • https://cdn.sqhk.co/vunebapenuj/Fhhijji/hungry_shark_free.pdf
    • https://tewizoduwab.weebly.com/uploads/1/3/5/3/135341898/wekituvatu.pdf
    • https://mamudige.weebly.com/uploads/1/3/0/8/130874639/vulafugiwik.pdf
    • https://ludiwutigavas.weebly.com/uploads/1/3/4/6/134697468/sufapumugufur.pdf
    • https://ripodomix.weebly.com/uploads/1/3/0/7/130775876/luzanikoviv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c751e6e8-0850-424d-b14e-d7ae46260796.filesusr.com/ugd/bc1028_1ef02e7e7e0a45bba39dc84b4d9282c3.pdf?index=true
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_3f248cef8e7f43c6ac5c4b72c5809a35.pdf?index=true
    • https://s3.amazonaws.com/resixexi/shiv_bhola_bhandari_song_arijit_singh.pdf
    • https://s3.amazonaws.com/zolerazowubow/epson_v550_scanner_best_price.pdf
    • https://2061f665-9309-41a6-981d-137229ee7e60.filesusr.com/ugd/eb2fe6_ae3adf90334b4ed08aaf00f14a39a749.pdf?index=true
    • https://s3.amazonaws.com/saziwijaxodav/suwoz.pdf
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_315a2b8728644e5bba67fdd3968abc99.pdf?index=true
    • https://676a7a22-5bec-432e-92e0-9d4a0a27851c.filesusr.com/ugd/a1fb72_f3309f49ecee4dcc9c2f16de13e5cc73.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013039.bin
9abdaff0d0ef5f335d6710372df50389d4b1b7824afcb1ce674e9fd5fe41a907		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13039 5416 bytes
font_01_sfnt_off000142d3.bin
f7bd4825de903974f5e78f3acaf32087dea90c39b34d6ff331802760a21afb5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142D3 11088 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.