Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f33ab3e681cc1c5…

MALICIOUS

PDF

41.2 KB Created: 2020-05-12 23:40:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-10
MD5: 61606c313420dc204ba251de99f0166b SHA-1: 50135ecfb491fe9dd18df166f54823948b5e9c69 SHA-256: 1f33ab3e681cc1c5debadda297f729a6df85c1e50e2cb218c86c518fb5dcbbb1
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links to various domains, identified by the PDF_SEO_LINK_FARM heuristic. The embedded document body also contains URLs, including one that appears to be a lure for 'Android hdr camera app test'. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent, possibly for SEO spam or distributing further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://allanali.com/uploads/1/3/0/2/130289675/130289675.html#android+hdr+camera+app+test PDF link annotation
    • http://leddesertwhips.com/uploads/1/3/1/6/131607445/pedovipaboxus.pdfIn PDF document text
    • http://ahmanique.net/uploads/1/3/0/4/130488181/e4295e4e88c25c.pdfIn PDF document text
    • http://piecebypiecestudios.com/uploads/1/3/1/0/131070381/49d1702bb54afd.pdfIn PDF document text
    • http://masterlinkdevelopment.com/uploads/1/3/1/4/131437293/144dda7b40e4.pdfIn PDF document text
    • http://prodam-berlin.com/uploads/1/3/0/6/130640219/gijafesofo_xiled_sibaw_tonixuxebomef.pdfIn PDF document text
    • http://theidealorganization.com/uploads/1/3/1/4/131409210/molizojili.pdfIn PDF document text
    • http://n-e-s.dev/uploads/1/3/1/1/131163876/zodewojoxen.pdfIn PDF document text
    • http://jovial.store/uploads/1/3/0/2/130287503/bexuverudazakoja.pdfIn PDF document text
    • http://janipepelanov.com/uploads/1/3/0/5/130540219/fetubawam.pdfIn PDF document text
    • http://americanbeachtour.com/uploads/1/3/0/6/130640144/favara.pdfIn PDF document text
    • http://primestiching.com/uploads/1/3/0/4/130476040/5064021.pdfIn PDF document text
    • http://fotografiamajooper.com/uploads/1/3/0/5/130539886/wedujetukumumu-sanomewozakig.pdfIn PDF document text
    • http://tszclan.com/uploads/1/3/0/7/130739107/8019119.pdfIn PDF document text
    • http://gab-archive.org/uploads/1/3/0/5/130551057/kasazinif.pdfIn PDF document text
    • http://flavorstw.com/uploads/1/3/0/9/130969332/pebajilosevibokedi.pdfIn PDF document text
    • http://artshopp.com/uploads/1/3/0/7/130739835/9929097.pdfIn PDF document text
    • http://catalystlightandsound.com/uploads/1/3/0/2/130288523/rezotapel_jabufebuxila.pdfIn PDF document text
    • http://haitiandbeyond.com/uploads/1/3/1/4/131406154/5217805.pdfIn PDF document text
    • http://driftawayvacations.net/uploads/1/3/1/1/131164562/2049583.pdfIn PDF document text
    • http://2dinvestsarl.com/uploads/1/3/1/4/131454178/nodelo.pdfIn PDF document text
    • http://northerncoloradofarrier.com/uploads/1/3/0/8/130814681/rasar.pdfIn PDF document text
    • http://gridhop.net/uploads/1/3/0/7/130775702/lexaruvipemup.pdfIn PDF document text
    • http://pianowithjamie.com/uploads/1/3/0/5/130590589/fulamuvudomosuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000758e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x758E 10328 bytes
SHA-256: eeab48c98416448218fcf36b6f408faa8d11356db8e278bb101a117ee755f988

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