Malicious PDF — malware analysis report

Static analysis result for SHA-256 435d1a08f5105d26…

MALICIOUS

PDF

67.6 KB Created: 2021-02-26 10:46:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bf6a70bbad0dc533e202ef7c1ad80ca3 SHA-1: 4f55bf81ce1e495c1b51e5b3854fe196306c6465 SHA-256: 435d1a08f5105d26a60e49fe4b59926fa8820b80154aabae5bd141475107df4c
252 Risk Score

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
  • 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.
  • 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.
  • 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
  • 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://yafferge.ru/wb?keyword=how%20to%20pair%20logitech%20h800%20headphones In PDF document text
    • http://lnstagram-helping-centre.com/did_stefan_die_in_vampire_diaries_booko824j.pdfIn PDF document text
    • http://magazinrf.xyz/22339909188hg295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_6025968fb92ab.pdfIn PDF document text
    • https://vemetufubejukat.weebly.com/uploads/1/3/4/3/134367776/18c670be6f04a.pdfIn PDF document text
    • https://bobiguwifuza.weebly.com/uploads/1/3/5/9/135966914/7580679.pdfIn PDF document text
    • http://big-ita.space/alpina_baby_2_informacion_nutricional8dh20.pdfIn PDF document text
    • https://cdn.sqhk.co/zovigobut/dhghYvN/raid_ant_bait_active_ingredient.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_602303ca22799.pdfIn PDF document text
    • https://xeludelibiw.weebly.com/uploads/1/3/4/3/134371965/a5d72.pdfIn PDF document text
    • https://xigogedamexov.weebly.com/uploads/1/3/1/3/131384098/1215527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497370/normal_6022292252bb3.pdfIn PDF document text
    • https://nedidibizexoba.weebly.com/uploads/1/3/0/9/130969065/7b7ad5dca64c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474997/normal_6028310040615.pdfIn PDF document text
    • https://vasalidut.weebly.com/uploads/1/3/0/9/130969475/tiginigutuzidan.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/gorajikunobixi/midaxoduwugalogoto.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/if_you_don_t_answer_me_meme.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/81521060444.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/been_calling_music_video.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_off0000c78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78B 5724 bytes
SHA-256: 78fbd256b52aa7b02d716ca5313cf9c66fb081b5e026eecccee46764f4f79105
font_01_sfnt_off0000db0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0D 10692 bytes
SHA-256: a835bc22680056219a90a74d6d2511cbff1f471386018a39a4f65cbba7b74ea9