Malicious PDF — malware analysis report

Static analysis result for SHA-256 86edaca444689ed3…

MALICIOUS

PDF

189.0 KB Created: 2021-05-24 10:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d6cca883e75814998a52db4664313c28 SHA-1: 52b316eb7d032622e3f6b4327ad4ba711ceaeae5 SHA-256: 86edaca444689ed3e60166284ad419e6415051e86274db96b739b53e472ddede
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm designed to obscure the ultimate destination. The primary URL, 'https://pelibifir.ru/strik?utm_term=download+attack+on+titan+season+2+end+of+the+world+full+movie', suggests a lure for pirated content, likely leading to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 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.
  • 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://pelibifir.ru/strik?utm_term=download+attack+on+titan+season+2+end+of+the+world+full+movie PDF link annotation
    • https://befuvabesuwab.weebly.com/uploads/1/3/0/7/130740391/fugovixuva-norivusutisa-fifavi.pdfIn PDF document text
    • https://davijune.weebly.com/uploads/1/3/5/3/135315517/risifadutewifofufudi.pdfIn PDF document text
    • https://rekakugiraki.weebly.com/uploads/1/3/4/6/134623504/betogi.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/kogironopefa-puxexozolawuput.pdfIn PDF document text
    • https://zivukiwele.weebly.com/uploads/1/3/4/7/134749768/7cd6a7c7f8f6ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485695/normal_600ef43257de8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_601e94ec53888.pdfIn PDF document text
    • https://pekupepavipojev.weebly.com/uploads/1/3/1/8/131872203/2898641.pdfIn PDF document text
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/bebibe.pdfIn PDF document text
    • https://momexifolel.weebly.com/uploads/1/3/4/3/134319719/fixupuwiloxobilol.pdfIn PDF document text
    • https://wowobomufib.weebly.com/uploads/1/3/0/8/130874304/masimawosikag-gamumaxe-nobuzomuduxuzu.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/877041.pdfIn PDF document text
    • https://wuvumivew.weebly.com/uploads/1/3/1/4/131410662/6875493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470843/normal_6052b84ce4949.pdfIn PDF document text
    • https://lupilizeranal.weebly.com/uploads/1/3/4/4/134460298/a37817d2daa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485318/normal_60637dbb3049e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484122/normal_5fec07dd331e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406208/normal_6009c05a44470.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wurivuve/55559770052.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/formatting_code_in_eclipse.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/26049631492.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000277cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x277CC 13280 bytes
SHA-256: eda9e677fb2d3b7c9efcb460893429046657c6f271a13e3e8bc16e4850fe7b4c
font_00_sfnt_off00018aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AA1 71640 bytes
SHA-256: 329fa33751fb5642030955b067ae66190360ec25abd3aef83d3a4be39aa02be1
font_01_sfnt_off000264c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x264C5 5608 bytes
SHA-256: 11d1fab2af700f9a7c23bd0b4775d4a40d2490f0728f7a04a9fe2b2475be4367
font_03_sfnt_off00029d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29D5A 15376 bytes
SHA-256: c0509fb2c5c722dab70745c2df8c17df4ce833f46ac1798830f31c4dba6aee1b
font_04_sfnt_off0002cda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CDA4 16680 bytes
SHA-256: e67cba6180d11f2a05ae244d773f55452a3d85cf947880f3c6812707934bd992

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