Malicious PDF — malware analysis report

Static analysis result for SHA-256 3acc655340d00079…

MALICIOUS

PDF

55.5 KB Created: 2020-11-03 01:19:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6c79d9f93345fd041221ef90d5ae6568 SHA-1: 90c8b24acf43c791ca9c72251ded7992acc62942 SHA-256: 3acc655340d00079645d02539891bed032e4983e33979a4bbbb036e061510c87
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses an MFA/2FA-themed lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://ggtraff.ru/strik?keyword=vtech+phone+cs6829-2+owners+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5f9206a9535b3.pdfIn PDF document text
    • https://lubuminovek.weebly.com/uploads/1/3/4/5/134590555/fe0f0086efc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cb697f6-fe73-467f-9e1f-852cb6ef2188/mepamuwirinebozipegawed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/8463/6320/files/96209020270.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/laxefilu.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/31155058698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9461/7498/files/rajujaxunerapukovejuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/0831/6320/files/qasida_ghousia_dawateislami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/3518/6082/files/jopegasonobapafixi.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/jjba_steel_ball_run.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7309/1769/files/purse_hook_for_table_target.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_off0000968d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x968D 5900 bytes
SHA-256: 50b139149e661e590ecc8ea533ee0c74db8260401a9afb78f04d8b25307667c1
font_01_sfnt_off0000aa91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA91 11608 bytes
SHA-256: 001abaf1e0bd60a47a9e796e79e9367d58660acbd783f10203fb708867522ef3

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