Malicious PDF — malware analysis report

Static analysis result for SHA-256 5836d8f33e16b91a…

MALICIOUS

PDF

77.1 KB Created: 2021-03-16 07:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 62e325e1762d4be9ccf42bb15ebcf6bb SHA-1: 5ae71b7e88fa1e142dd44dbb825dd178c3ef3b19 SHA-256: 5836d8f33e16b91aa2a1b397413f5f0615349377b7c1882eb47694e1065ed49b
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, one of which is `https://fokemale.ru/123?utm_term=business+card+mockup+psd+free++graphicburger`. The document body, though heavily obfuscated, suggests a lure related to 'business card mockup psd free graphicburger'. The presence of many external links on disposable hosting points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/123?utm_term=business+card+mockup+psd+free++graphicburger PDF link annotation
    • https://varovugunigode.weebly.com/uploads/1/3/4/4/134480676/tilejagevibitodom.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/cb4sJek/touchdown_football_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwonukunav/iXiciby/85430080061.pdfIn PDF document text
    • https://denibemexe.weebly.com/uploads/1/3/4/5/134597338/5375975.pdfIn PDF document text
    • https://fupigipefixoxom.weebly.com/uploads/1/3/1/3/131379213/zejejar-vejifizowa-sevelebufisival.pdfIn PDF document text
    • https://fudamugifotud.weebly.com/uploads/1/3/5/3/135323440/8164663.pdfIn PDF document text
    • https://bevereka.weebly.com/uploads/1/3/0/7/130739533/2738007.pdfIn PDF document text
    • https://kisujaxu.weebly.com/uploads/1/3/0/7/130775962/zawekanupa_vuzoluvam_zigexuti.pdfIn PDF document text
    • https://cdn.sqhk.co/saligoliti/cuhckPr/22321936143.pdfIn PDF document text
    • https://bujipivew.weebly.com/uploads/1/3/4/1/134131373/xozumutatidada_tunej_xuzekajela_xududiwoxiwonaw.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/BjjegjB/nagokaxolujikofukovazolop.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/hbQqgg3/21937072901.pdfIn PDF document text
    • https://buvapubadoloj.weebly.com/uploads/1/3/4/2/134265521/035869.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_595275c4d27d436f9e1b7e5292c1c2b9.pdf?index=trueIn PDF document text
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_8d9127e6d269421689ce20fefcbb3156.pdf?index=trueIn PDF document text
    • http://takidivogemoku.epizy.com/class_9_english_beehive_the_road_not_taken.pdfIn PDF document text
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_e77f003d3a654fe59ae123a8f7127985.pdf?index=trueIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_613addc7fedd49da818ee7016c2c9259.pdf?index=trueIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_792ecda6db084ca9b37ef77a97dc02c1.pdf?index=trueIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_f0d352ed19ef4223a3938bd63bedbe03.pdf?index=trueIn PDF document text
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_8de52e3931cc471084dcb0d7423f79cc.pdf?index=trueIn PDF document text
    • http://bobepenuf.rf.gd/does_convict_conditioning_work.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_c7268a4dfbd54b4e830779059393d022.pdf?index=trueIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_925232d0a2694835a617df19c80dcb5b.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3F 5792 bytes
SHA-256: ef4466a2c23da25103180a8ab957dca620399bb3c6c09b6bd9cc5149a099dc87
font_01_sfnt_off000101d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D3 10876 bytes
SHA-256: 3064f8afbdec652456571c0c649d355e5b88f5798129133547924b1867d2b859

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