Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01c72b0518d1d8b…

MALICIOUS

PDF

46.9 KB Created: 2020-04-09 14:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: a49cf76a76f2e785a6712e021d305450 SHA-1: 34c5613ceedc74b86b322c6059e637c10ed60f2d SHA-256: b01c72b0518d1d8b36e2d5dd12fde0c9128e2ff6723da904f84ec2bb7d1fba72
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body mentions 'Disco duro 250gb samsung ssd 970 evo m.2 2280', suggesting a lure to disguise the malicious links as product information.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://razerupin.com/uploads/1/3/0/2/130289481/130289481.html#disco+duro+250gb+samsung+ssd+970+evo+m.2+2280 PDF link annotation
    • http://pathwaysto.org/uploads/1/3/0/5/130538836/77c9f99dd.pdfIn PDF document text
    • http://bethrabin.com/uploads/1/3/0/4/130435986/zedugopuritaba.pdfIn PDF document text
    • http://vectordancecompany.com/uploads/1/3/1/4/131406506/17e45e748b5.pdfIn PDF document text
    • http://bitchutedirectory.com/uploads/1/3/0/5/130590496/nupetaresotipo.pdfIn PDF document text
    • http://readytorideinc.com/uploads/1/3/0/3/130313323/b01a15afb96042.pdfIn PDF document text
    • http://moneywhileyousleep.us/uploads/1/3/0/5/130589251/5067781.pdfIn PDF document text
    • http://vbslawnandgardenservices.com/uploads/1/3/1/4/131407351/lifopaguzov.pdfIn PDF document text
    • http://lets-split.com/uploads/1/3/1/4/131437957/65097e6.pdfIn PDF document text
    • http://ibrafertil.com/uploads/1/3/0/8/130813756/jesibipeluzu-fopunivexoludap.pdfIn PDF document text
    • http://johnwinogrocki.com/uploads/1/3/0/5/130589267/3324206.pdfIn PDF document text
    • http://zohreh.us/uploads/1/3/0/2/130271001/buvegopu.pdfIn PDF document text
    • http://ladiffproprete.net/uploads/1/3/0/9/130969529/287940.pdfIn PDF document text
    • http://warmnightcandles.com/uploads/1/3/0/7/130739782/ea2e9.pdfIn PDF document text
    • http://rebelplantationhuntclub.com/uploads/1/3/0/6/130620859/b7f273424450.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74BE 9312 bytes
SHA-256: 6222cbf755240d84fd1477b0feb5b095f391c8abccdafcfc829d1eecaf617b29
font_01_sfnt_off0000968f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x968F 16260 bytes
SHA-256: 2b57b2f7c8f3bc38d05bd7e1919dcd7d971d606ce90b2da6579e55cc4e86234a