Malicious PDF — malware analysis report

Static analysis result for SHA-256 647c551fb377d070…

MALICIOUS

PDF

85.6 KB Created: 2021-01-25 09:25:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: eeab6d816e5777a41afb9f76cc59ec61 SHA-1: e1ae7f249bc06b5907cbfc1a311ba697da03c2d2 SHA-256: 647c551fb377d0702be3d050d2e3350c1fdfef351d81936cfed9865986f947d1
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector and a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://gettraff.ru/wb?keyword=math%20calculator%20online%20limits In PDF document text
    • https://fekadoripegat.weebly.com/uploads/1/3/4/5/134592683/a93280bb0b556e.pdfIn PDF document text
    • https://sinipipa.weebly.com/uploads/1/3/0/8/130874509/potimumawej_banoberejazoz_naxileramatom.pdfIn PDF document text
    • https://tefegepivovopuf.weebly.com/uploads/1/3/5/3/135311357/1495354.pdfIn PDF document text
    • https://nulivuxod.weebly.com/uploads/1/3/0/7/130776854/c923bf99120b2a.pdfIn PDF document text
    • https://robugagemo.weebly.com/uploads/1/3/5/3/135304688/zebonesogeru.pdfIn PDF document text
    • http://jedugefipevama.iblogger.org/patugowe.pdfIn PDF document text
    • http://rapisakaxo.66ghz.com/cooking_merit_badge_answers_2017.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/ketuguxadigi.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/1269790.pdfIn PDF document text
    • https://malugeko.weebly.com/uploads/1/3/1/6/131636988/fuxoretarupexe_rituxusesa_fifaluku_sejexaz.pdfIn PDF document text
    • https://mamunazeve.weebly.com/uploads/1/3/0/8/130814121/7477256.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/kakekojezutok/wubokepatorufibire.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/quantifiers_examples_with_answers.pdfIn PDF document text
    • http://rolaxaja.rf.gd/nice_guidelines_pregnancy_and_exercise.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/accident_report_sample_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/duwuzopepavofuniw.pdfIn PDF document text
    • http://sujotoginejo.rf.gd/jexiwug.pdfIn PDF document text
    • http://zatajuvezutulo.rf.gd/arya_2_malayalam_movie_cinemavilla.pdfIn PDF document text
    • http://sipomivizipe.epizy.com/kala_patthar_full_movie_hd_720p.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_off00010383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10383 4928 bytes
SHA-256: 04b4b09c7de5e70a6587d3d3119ae01a176fb77ddc6fe72c24cac6f146e9940b
font_01_sfnt_off00011412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11412 11376 bytes
SHA-256: 8506dc35ce07cf9bec50c04da9af930e3021504a84afffc7af045312801b8cac
font_02_sfnt_off00013ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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