Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e881bb7e5ed7d1…

MALICIOUS

PDF

124.3 KB Created: 2021-02-16 21:14:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ca2966fc1c2a40ece400fd308c18c351 SHA-1: 7265cdd58664450ccae291d95d2fb6e548b64313 SHA-256: 27e881bb7e5ed7d155481e2799a8ff68cde956abe32a1625ed25af31217b8d0c
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm or SEO spam campaign. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially malicious content, aligning with phishing or malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/strik?utm_term=dragon+age+origins+companion+conversation+guide PDF link annotation
    • https://cdn.sqhk.co/togareguko/jgid72n/top_female_country_hits_2020.pdfIn PDF document text
    • https://rexekimat.weebly.com/uploads/1/3/4/0/134017736/jenakifijabul_nozokuvuvez_gakolujikisazu.pdfIn PDF document text
    • https://fipamowusaki.weebly.com/uploads/1/3/4/8/134879766/d1582fd.pdfIn PDF document text
    • https://dupazenulejafu.weebly.com/uploads/1/3/4/3/134331878/5721538.pdfIn PDF document text
    • https://cdn.sqhk.co/ramidazumiko/jlhhUjj/badminton_league_old_version_apkpure.pdfIn PDF document text
    • https://zozilevijuni.weebly.com/uploads/1/3/1/3/131383476/422701.pdfIn PDF document text
    • https://mufamemibota.weebly.com/uploads/1/3/1/8/131856380/5139442.pdfIn PDF document text
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/3613061.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/VibgdhO/14401038686.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/B2tjcB8/23396222625.pdfIn PDF document text
    • https://vixagukire.weebly.com/uploads/1/3/4/3/134364056/namovamumer.pdfIn PDF document text
    • https://tonavamajarow.weebly.com/uploads/1/3/4/6/134694337/2611971.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/rukowuxitu.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/16250847.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/rms_and_average_value_of_square_waveforms.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D7F 5304 bytes
SHA-256: a007828aeb008bb6e655848772497caee6ec054bf32c225eeea90db38820f758
font_01_sfnt_off0001af76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF76 11144 bytes
SHA-256: e81b0d3f6fbfab1276f98a24a085158b5abc0fd7e5b45e1fd7ae55e3838c3aea
font_02_sfnt_off0001d532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D532 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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