Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b5075ad576e3c6…

MALICIOUS

PDF

44.8 KB Created: 2020-03-31 01:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 02d3b2a791d2fc1ab483acbc0eb0e8ed SHA-1: 884bf60ebea362c3a0083afcd0d5298d3bb24b4e SHA-256: 38b5075ad576e3c6070b1a17fe3bf7aa975b96488e68844aa63725270d382f00
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains. This pattern is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the analysis of specific behaviors.

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://goodboysonlyclub.com/uploads/1/3/0/5/130588210/130588210.html#libros+de+matematicas+1+bachillerato+pdf PDF link annotation
    • http://harrisonlakehousevacationhome.com/uploads/1/3/0/7/130776734/jilowurir_liragufap.pdfIn PDF document text
    • http://yourbeautifulbrain.org/uploads/1/3/0/7/130776272/d1223baa.pdfIn PDF document text
    • http://sorayaattia.com/uploads/1/3/1/4/131437376/899919.pdfIn PDF document text
    • http://darrensiriani.com/uploads/1/3/0/8/130873820/zezowek-womonuralisejud-nudufupej.pdfIn PDF document text
    • http://buydirectgaragedoor.com/uploads/1/3/1/1/131164312/nefoxil.pdfIn PDF document text
    • http://troop555.org/uploads/1/3/0/6/130605335/kokoxofisite.pdfIn PDF document text
    • http://stankarwoski.com/uploads/1/3/0/4/130489417/vevubela.pdfIn PDF document text
    • http://thestepfords.com/uploads/1/3/1/1/131163514/cf6726fa.pdfIn PDF document text
    • http://dancingforjoybook.com/uploads/1/3/0/5/130543106/jekapusaguwevi-mubisu-reviborimofalog-kotebiki.pdfIn PDF document text
    • http://awhistleawaypetcare.com/uploads/1/3/0/6/130639259/a4b290355571df9.pdfIn PDF document text
    • http://reikirevolution.org/uploads/1/3/0/6/130620431/fevepapivunakosexu.pdfIn PDF document text
    • http://vanessalara19.com/uploads/1/3/0/6/130621483/zexivufonexuna-mekibuwajavewo-xelube.pdfIn PDF document text
    • http://hannahfidler.com/uploads/1/3/1/0/131070497/paxiginez.pdfIn PDF document text
    • http://fitactivebodies.com/uploads/1/3/0/2/130270762/6600818.pdfIn PDF document text
    • http://thiscaregiverlife.com/uploads/1/3/0/5/130546497/vatelasop.pdfIn PDF document text
    • http://permidri.com/uploads/1/3/0/4/130435819/2565467.pdfIn PDF document text
    • http://jhdesignltd.com/uploads/1/3/0/4/130488580/wadusifeke.pdfIn PDF document text
    • http://appbolo.com/uploads/1/3/1/4/131406732/pobimokewuvi.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
🗂 Part of campaign: dancingforjoybook.com 5 samples

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_off00006e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E41 8660 bytes
SHA-256: 8f153fb4c821f9c407c240814089bc710eb7e222a337cabe2cdca79db268d536
font_01_sfnt_off00008dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFD 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d

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