Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d556fbaecf649e5…

MALICIOUS

PDF

64.8 KB Created: 2020-12-07 08:43:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9e810d388c95ae2fdde4882cba89702d SHA-1: 9891daae1a95360661a0b439045a38cfa1b8e3c9 SHA-256: 1d556fbaecf649e5d7b438db78613f818728a862c2ac96d43889d6b6163ae6f9
204 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document uses a lure related to a 'Dolby sound app for android' and contains numerous external links, including a redirector to 'traffnew.ru'. This suggests a phishing or scam attempt, potentially using SEO tactics to distribute malicious content. The presence of a ML classifier flagging it as malicious and ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/aws?utm_term=dolby+sound+app++for+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407066/normal_5fc7455aecea5.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/9958492.pdfIn PDF document text
    • https://taruzabob.weebly.com/uploads/1/3/4/4/134493447/rugimogamajuwijub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484993/normal_5fc0c205bc2ed.pdfIn PDF document text
    • https://sonojija.weebly.com/uploads/1/3/4/7/134723635/tawabelut.pdfIn PDF document text
    • https://sebiwijojemobod.weebly.com/uploads/1/3/4/0/134097571/8ca55538a872.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/fadedosi/lullaby_piano_sheet_music_nickelback.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/jailbreak_tool_ios_13.1.2_for_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/western_civilization_8th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/46256128384.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/21537649480.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/40626819699.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/time_zone_for_area_code_226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57ba7179-3247-4599-ad58-de73dfa0ba25/pet_badge_cubs.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/soxogotegafodazakakazaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb4dfc4-501a-47f0-9fb2-1791fc881dc1/wutanadin.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

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_off0000c0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AF 5276 bytes
SHA-256: f43e974ab09b8843dcd7b74efba4a1888f3a3d28610a06a85fc04d09f643b630
font_01_sfnt_off0000d2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B0 10544 bytes
SHA-256: c17e3dbb8037fa00176fdfe486a5bce89699bdc2c5a497d0d95438e0792828c7

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