Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1cdc69281d4dc1f…

MALICIOUS

PDF

41.3 KB Created: 2020-04-27 05:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 644d239a80c116c41f5ae5b7a46e6617 SHA-1: 824b6405ce6b851f577fe1af9d2f21d5e915a851 SHA-256: a1cdc69281d4dc1f805017a604ff97a70bbbf52bde4a15896193c714626c41dd
104 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and driving traffic to malicious sites. The document body, though heavily obfuscated, contains text related to movie downloads and references URLs that likely host further malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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
  • 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://serafinaappel.com/uploads/1/3/1/1/131163651/131163651.html#the+chaser+full+movie++300mb PDF link annotation
    • http://shpecentralflorida.org/uploads/1/3/1/0/131070920/9f08fd191cdce9.pdfIn PDF document text
    • http://rajaampatdivers.com/uploads/1/3/0/5/130539102/277e92e.pdfIn PDF document text
    • http://amandaarensdorf.site/uploads/1/3/0/8/130874520/mujuwevivuwumow.pdfIn PDF document text
    • http://bhamorthopedicacupuncture.com/uploads/1/3/0/6/130620961/9d6650d259efe89.pdfIn PDF document text
    • http://westcoastjointandspine.net/uploads/1/3/0/6/130603785/faboseligaf.pdfIn PDF document text
    • http://dreammakerfunding.com/uploads/1/3/0/4/130483809/wadelutibajizisaki.pdfIn PDF document text
    • http://sedona-verdevalley.net/uploads/1/3/0/3/130379060/9e9bb5213bc.pdfIn PDF document text
    • http://manipolbcn.com/uploads/1/3/1/0/131071181/8151620.pdfIn PDF document text
    • http://laraefx.com/uploads/1/3/1/6/131636602/3553490.pdfIn PDF document text
    • http://nrmsmatters.org/uploads/1/3/0/5/130541346/370072.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54DD 7296 bytes
SHA-256: b81864466b73ed36acc25d0224ca4287bbb4c3e9f04c33d93e46958a933ff2d5
font_01_sfnt_off000071a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A9 1388 bytes
SHA-256: 1723f1ced37cc89d69e30f3df6281c5e5fb8989544fd4587aa75b00c91af2fd0
font_02_sfnt_off0000790f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x790F 11064 bytes
SHA-256: e0e3c17e77d4e8eb6c15310c6c8e4d0b1bb105d92337a8b1fee52ec7364f50f3

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