Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f863a42597ca8c…

MALICIOUS

PDF

66.6 KB Created: 2021-02-24 04:29:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 35f5d65c49267e46a21ecec3cc10935b SHA-1: 25de3c788822aacc393ee6f7a12700567e726a93 SHA-256: 62f863a42597ca8cf55e74871309a8824ab819840ba5fd9ef62fefd220c31852
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution lure, likely leveraging embedded JavaScript for malicious actions.

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
  • 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.
  • 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/strik?utm_term=how+to+use+a+polaroid+onestep PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378605/normal_5feb2b6e020c3.pdfIn PDF document text
    • https://tunupufimudodo.weebly.com/uploads/1/3/4/3/134324073/3545968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485442/normal_6009b35105b6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371247/normal_60070fd709d0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368976/normal_5fec457f31b95.pdfIn PDF document text
    • https://disemorabegelam.weebly.com/uploads/1/3/1/3/131383982/nibidotunugipip_zuxafosatelo_todoxanil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_600a7a76e19bb.pdfIn PDF document text
    • https://turexebino.weebly.com/uploads/1/3/4/2/134265835/5008350.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/godewumazek/44173634461.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/walkthrough_chrono_cross_bahasa_indonesia.pdfIn PDF document text
    • http://kujuzumofad.rf.gd/best_friend_quotes_in_marathi_images.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/wuwezudunirunebuvede.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/94313832795.pdfIn PDF document text
    • http://vedaremix.epizy.com/blackarmor_440_manual.pdfIn PDF document text
    • http://feselipalez.epizy.com/nitolidekekebizek.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/nuradove.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/odia_new_dj_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/blank_tri_fold_brochure_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/quran_recitation_with_english_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/87913960574.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_off0000c930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC930 5004 bytes
SHA-256: a280d28c62b327e50754c5d6d22b193b380dd1f5ee44ef98ced11b176a8a14bb
font_01_sfnt_off0000da4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4E 10292 bytes
SHA-256: 8d3014f2d7e80627c21acbae233be9007e839bf9ca3e5af2af42d86e344f6ff6

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