Malicious PDF — malware analysis report

Static analysis result for SHA-256 db92548369dd18f0…

MALICIOUS

PDF

54.8 KB Created: 2020-03-27 03:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: ba8d9497b784eff885ec4191ac582851 SHA-1: f7112bb439f6bd66b48a040de2844658741049d9 SHA-256: db92548369dd18f0b47daad47a357985505b27eaf9756238973e230f4747160f
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, many of which point to other PDF files hosted on various domains. This pattern is indicative of a link farm, often used to manipulate search engine results or to distribute malicious content. The primary URL extracted, 'http://thesingbabysingshow.com/uploads/1/3/1/3/131379738/131379738.html#how+to+repair+electric+lazy+boy+recliner+mechanism', suggests a lure related to repair guides, which is a common tactic for phishing or malware distribution. No scripts were extracted, and the document body was heavily obfuscated, but the heuristic firings strongly suggest a malicious intent related to URL redirection and content hosting.

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://thesingbabysingshow.com/uploads/1/3/1/3/131379738/131379738.html#how+to+repair+electric+lazy+boy+recliner+mechanism PDF link annotation
    • http://mail.connallyband.com/uploads/1/3/0/2/130289369/56ca4c.pdfIn PDF document text
    • http://www.synergyassistllc.com/uploads/1/3/0/7/130775465/fbc56294fd21357.pdfIn PDF document text
    • http://daphnelpostssacn.com/uploads/1/3/0/3/130323377/3fdc2791.pdfIn PDF document text
    • http://lifebyarchitecture.net/uploads/1/3/0/8/130813618/5207229.pdfIn PDF document text
    • http://cchandymanservices.net/uploads/1/3/1/0/131070441/punuf.pdfIn PDF document text
    • http://modtran7.net/uploads/1/3/0/8/130873781/rutam.pdfIn PDF document text
    • http://littlesilverems.com/uploads/1/3/0/4/130435795/9269929.pdfIn PDF document text
    • http://peopleswedding.com/uploads/1/3/0/9/130969735/3391681.pdfIn PDF document text
    • http://conscienceskinlabs.com/uploads/1/3/0/7/130775130/4961044.pdfIn PDF document text
    • http://michlexcareservices.com/uploads/1/3/0/4/130488101/a53a58fb7d3a01.pdfIn PDF document text
    • http://www.ourarvoshift.com.au/uploads/1/3/0/6/130621480/masedizav-riletagaxabe-nitugas.pdfIn PDF document text
    • http://yourvolution.com/uploads/1/3/0/4/130489082/06ba1089.pdfIn PDF document text
    • http://hostmaster.cheshirebuildinglimited.com/uploads/1/3/0/7/130739897/8303012.pdfIn PDF document text
    • http://heirfi.com/uploads/1/3/0/2/130272575/jasuragomosexutowoj.pdfIn PDF document text
    • http://rvayesatlabs.com/uploads/1/3/0/2/130289668/gusuwuralapoz.pdfIn PDF document text
    • http://tankchairextreme.com/uploads/1/3/1/3/131380126/281389.pdfIn PDF document text
    • http://carolynwiese.com/uploads/1/3/0/9/130969845/496d79a0bd57315.pdfIn PDF document text
    • http://rustlersstarvalley.com/uploads/1/3/0/8/130874565/4112008.pdfIn PDF document text
    • http://mahmudhamdiassociates.com/uploads/1/3/0/5/130538838/32dba0866fc4c.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
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E14 6728 bytes
SHA-256: 5278024270de67705d3a5034a26ce2f5e1d9e53f50705cc770b2190155f81e7b
font_01_sfnt_off00008eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB7 8012 bytes
SHA-256: 5d0c6923449eb7d165d6c8cc5931c90525cc75f52c62e38b2f3cc46f92f21c68
font_02_sfnt_off0000adf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADF1 1556 bytes
SHA-256: 736cd2d33175a5a13ef050b14347fdc238d98c9b1a4a011ca05e63a00a87de6d
font_03_sfnt_off0000b601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB601 16328 bytes
SHA-256: a2aed6e222c3e59cd783f8eaa8571a4572603d2d1d4325508d6783068674e767

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