Malicious PDF — malware analysis report

Static analysis result for SHA-256 781ceecb1445ab1d…

MALICIOUS

PDF

89.1 KB Created: 2021-03-21 11:57:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 678808c39f3003b3b8f7cb62746dbfa0 SHA-1: 12dd47efe24abed66c9d945be21a9caee4ac007e SHA-256: 781ceecb1445ab1d0026179ea3604544c2ba056016935b7d1af8aec124076cb9
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-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://jottigo.ru/123?utm_term=definition+of+communication+pdf PDF link annotation
    • https://tewutenuka.weebly.com/uploads/1/3/2/6/132695339/329079.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/bXhcgcj/phage_meaning_in_english.pdfIn PDF document text
    • https://vexuzunudupugez.weebly.com/uploads/1/3/0/7/130740013/nuroven-talufikosi-puzuwavutuku-wibalot.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/tewasukilazisitipo.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/gPjfhfO/15487485547.pdfIn PDF document text
    • https://cdn.sqhk.co/tekonunise/e4Ckt6f/glow_hockey_online_unblocked.pdfIn PDF document text
    • https://vosanuxavuzom.weebly.com/uploads/1/3/6/0/136089669/videbagofasufuxomeko.pdfIn PDF document text
    • https://cdn.sqhk.co/joxezexukub/ygg6dhj/zokojowexabofemonowumep.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvowiraxuf/xjf0jnG/vaaste_lyrics_free.pdfIn PDF document text
    • https://cdn.sqhk.co/pategazikiw/ngjv8wp/moxaguteperonamor.pdfIn PDF document text
    • https://cdn.sqhk.co/xokipuxat/ij3hdjc/50648380334.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/TVggbOU/vector_2_apk_mod_free_download.pdfIn PDF document text
    • https://jenodaxadow.weebly.com/uploads/1/3/4/0/134012655/mikegepakefuveb.pdfIn PDF document text
    • https://cdn.sqhk.co/rijakobebux/p9VXAjf/verizon_cloud_contacts_delete.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/d93c7c53-cfc0-4c65-8d00-4d094bf227d5/rojujajusudidubapinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a0483b0-a141-4ab1-80d8-06e4eb639fcf/52646826887.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/toxizivedugufamagisexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12caf3d7-f94a-4cf1-ba37-d37bde89d60f/speed_queen_industrial_washing_machine_prices.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/26145770797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791ea75c-48fc-4e4d-a7e9-d44193e01896/summer_infant_monitor_charger_29006.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/dometic_8500_awning_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/81516005914.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_off000120ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BA 4996 bytes
SHA-256: 1a78ae91a132a395c58be068dd82b73b5df7a5cc2f217da3fb196065964b5ba8
font_01_sfnt_off000131b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B4 10800 bytes
SHA-256: 06adaa67f2b8b7732e29599f7e26c5759423f9a3a112b86063e29ebf42adfb62

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