Malicious PDF — malware analysis report

Static analysis result for SHA-256 037de93d4e9f36b1…

MALICIOUS

PDF

70.6 KB Created: 2021-02-23 23:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: cd8fe970472b24820af5ba2c50fc2ea4 SHA-1: e9d08e7330db39a5a17d9741098379be5ea4f88e SHA-256: 037de93d4e9f36b19fa31d90f4443115c6d1022df705c265e02255e11dc5be5f
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 or subdomains, indicating a link farm designed to manipulate search engine results or redirect users to malicious content. ClamAV and ML classifiers confirm its malicious nature, and the presence of embedded URLs suggests potential for further exploitation or phishing. The document body, though heavily obfuscated, contains metadata related to PDF generation, reinforcing the structural analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=past+continuous+tense+exercises+perfect+english+grammar PDF link annotation
    • https://xejinifinedi.weebly.com/uploads/1/3/5/3/135305438/doxogelagele-gewes-tuwebit.pdfIn PDF document text
    • https://nalodewemutut.weebly.com/uploads/1/3/1/1/131164475/959cd4d.pdfIn PDF document text
    • https://sodipojemip.weebly.com/uploads/1/3/5/3/135325099/6aab35e036.pdfIn PDF document text
    • http://amst-watch-v2.club/tevekisizmo5v6.pdfIn PDF document text
    • http://pozesex.iblogger.org/importance_of_financial_reporting_slideshare.pdfIn PDF document text
    • https://botitanape.weebly.com/uploads/1/3/0/9/130969352/229691.pdfIn PDF document text
    • http://formblckr1.xyz/2019_ashrae_handbook_hvac_applicationik2a.pdfIn PDF document text
    • http://italiabeach.space/igora_royal_pearlescence_color_chartxwmgn.pdfIn PDF document text
    • https://bakofusu.weebly.com/uploads/1/3/2/3/132303024/2147788.pdfIn PDF document text
    • https://bixixadapi.weebly.com/uploads/1/3/5/3/135321875/0b3168695a636d4.pdfIn PDF document text
    • http://menetufebev.22web.org/taylor_swift_shake_it_off_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/2tj3BJ0/3d_paper_cut_artists.pdfIn PDF document text
    • https://bexukisutiso.weebly.com/uploads/1/3/0/8/130873741/zamugobizafaditebi.pdfIn PDF document text
    • http://medway24.com/trials_in_tainted_space_zilrq6i7.pdfIn PDF document text
    • https://cdn.sqhk.co/wirubetena/fyL4KEI/77410775716.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekata/CQUpjbw/irritable_bowel_syndrome_upper_left_abdominal_pain.pdfIn PDF document text
    • https://vedaputenada.weebly.com/uploads/1/3/5/3/135318287/517450.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guradewididexep.epizy.com/kovexozaregilolaturaxad.pdfIn PDF document text
    • http://bevakiwutoven.rf.gd/gefapijowoximofat.pdfIn PDF document text
    • http://nilipinuz.rf.gd/9262061263.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_off0000d76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76A 5496 bytes
SHA-256: 9eb6a33d102729f96763c1d733878f5ab3e987cedc11a82aa7ab602a48ba2eb6
font_01_sfnt_off0000e9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FD 10216 bytes
SHA-256: 81a827ee48537f2acba843b9420b527532ab5efcafbf41988aba3dc8432fdd8c

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