Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12c61daa9ce690c…

MALICIOUS

PDF

72.3 KB Created: 2021-05-24 15:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0f795c29dbcb049e6f2940eb7b8abf3e SHA-1: 70923f817df04a31631bc9061a8e8ec141dd5e10 SHA-256: a12c61daa9ce690cfc763d09fa2bc732b7ca4c7d694be427a3044a590d9873af
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 0.9996

Heuristics 6

  • 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.
  • 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://bologen.ru/strik?utm_term=ven+espiritu+santo+piano+chords PDF link annotation
    • https://resibifusonuj.weebly.com/uploads/1/3/4/8/134878176/lenageruf.pdfIn PDF document text
    • https://gubijebe.weebly.com/uploads/1/3/1/4/131483267/kegerisu.pdfIn PDF document text
    • https://zevoxonigex.weebly.com/uploads/1/3/5/3/135300088/kigipos_vepadiwasapo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472484/normal_603cb99891b62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_604e8762c91e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494432/normal_6045e514ac35c.pdfIn PDF document text
    • https://vomanoxugorufo.weebly.com/uploads/1/3/5/3/135331351/tuwupubizuse.pdfIn PDF document text
    • https://tiforunu.weebly.com/uploads/1/3/1/4/131437018/tuzariwa.pdfIn PDF document text
    • https://finonofegikagaf.weebly.com/uploads/1/3/4/0/134041572/latib_bilotegiwuw_lovew.pdfIn PDF document text
    • https://dolilifiwu.weebly.com/uploads/1/3/4/4/134401054/9687784.pdfIn PDF document text
    • https://vumevomuw.weebly.com/uploads/1/3/4/3/134335884/gusirevulepaxolafil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424935/normal_605d36b9baa5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428329/normal_5feebc793ac87.pdfIn PDF document text
    • https://xovamiwif.weebly.com/uploads/1/3/4/0/134096018/bedeg_nefojovizeduvob_jevijopizatigim_gawefuxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456999/normal_6025c076bc903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414357/normal_60183cff1cc62.pdfIn PDF document text
    • https://boxotegiperofog.weebly.com/uploads/1/3/1/3/131398000/2942865.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/dewutexorob/51328582514.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/21656694493.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/buscar_mi_android_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/fomexebibijapinejiwudol.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB27 5092 bytes
SHA-256: 4e475811890240c8327b7c4cf3fe9a601f8b796f5ee0f5d1b708f8a651c30517
font_01_sfnt_off0000ec72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC72 11492 bytes
SHA-256: a6b1960549ef8c217a96e1cb2c2f0e7a6a86dfd1c01c8a44195c9c4544b9c597

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