Malicious PDF — malware analysis report

Static analysis result for SHA-256 60201596c473b454…

MALICIOUS

PDF

79.6 KB Created: 2021-04-14 11:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 540a4d5fb99f824044933c94fd23aee9 SHA-1: b6a32be6c80fff0e1b3b1f413abc30e64a30e2dc SHA-256: 60201596c473b454bd5b3cc98c6f89636e57ef476e2962d97325486520732532
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which appear to be part of an SEO link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of numerous unknown URLs suggests a broad campaign attempting to lure victims through various deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/strik?utm_term=will+ipod+touch+get+ios+13 PDF link annotation
    • http://vezokikawelin.iblogger.org/incentive_spirometer_instructions.pdfIn PDF document text
    • http://srakan.space/88091999608uesa6.pdfIn PDF document text
    • http://lepawumu.22web.org/saitek_x52_software_windows_10_64_bit.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/efhjtgj/wutidivixakizepowiniguka.pdfIn PDF document text
    • https://pogunokele.weebly.com/uploads/1/3/0/7/130739789/sipomufevisixalakezo.pdfIn PDF document text
    • http://storedubai.shop/gesuwaxigego240hl.pdfIn PDF document text
    • https://vozokeku.weebly.com/uploads/1/3/1/8/131857213/b9189926.pdfIn PDF document text
    • https://cdn.sqhk.co/fakodozug/1jjtifQ/17432830880.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/pclj7ja/latojuzoxiw.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/vorofe.pdfIn PDF document text
    • http://raisinshub.pro/538377425586j644.pdfIn PDF document text
    • https://ruwuragawani.weebly.com/uploads/1/3/4/3/134383911/447e442efd9f9.pdfIn PDF document text
    • http://magnetfix.store/fender_hot_rod_deluxe_iii_fsr_limited_editionz5axv.pdfIn PDF document text
    • https://pawomasa.weebly.com/uploads/1/3/4/7/134737305/vuxulivored_kajokula_wepogobababel_kimib.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/ifB3mNf/hollywood_hitman_movies_list.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/bojafazes/central_hidroelectrica_del_mantaro.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/sway_dating_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/visual_basic_sample_programs_with_codes_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/5287186026.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/wills_eye_locations_in_nj.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/67661533736.pdfIn PDF document text
    • http://vogunipokomajif.rf.gd/lefogur.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/lugudedefobu.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/napasupadulokuranorosu.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/11351794200.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/what_is_the_samsung_ir_extender_cable_used_for.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_off0000f8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E3 5256 bytes
SHA-256: 9a69db8b68e31753622420968a7cd475c1ec61b0aa848f7bb8cf562e744f78e0
font_01_sfnt_off00010ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE1 11024 bytes
SHA-256: 84dda22e61a59c8a508957018ade08de9d541704624ea1b04080440c4260ce41