Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc70fd71b44561a…

MALICIOUS

PDF

103.7 KB Created: 2020-03-30 14:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dca7e8d6d04a39ac95ced886380a99f7 SHA-1: 1259ff14f1371ee64d1daa0dfb2fc80dc3ab7cb9 SHA-256: 4bc70fd71b44561adc97306de1071586153b6e0cce5630c11e7d534197063b42
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to PDFs with numeric or book-related slugs, suggesting a link farm for SEO poisoning. The primary URL, http://74-123-77-82.mgwnet.com/uploads/1/3/1/4/131437357/131437357.html#garbh+geeta+saar+in+hindi+download, is presented as a download for 'Garbh geeta saar in hindi', likely a lure to disguise malicious intent. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://74-123-77-82.mgwnet.com/uploads/1/3/1/4/131437357/131437357.html#garbh+geeta+saar+in+hindi+download
    • http://southernfertilityandsurgery.com/uploads/1/3/0/5/130588382/juramorugik-sotulefeku-bukuk-sufiz.pdf
    • http://wordpressultimatum.com/uploads/1/3/0/8/130815351/ac8f83513aa3e.pdf
    • http://stminingelectrics.com/uploads/1/3/0/5/130539933/nibebi_fivejof_botisewinamon_dusamipimatolep.pdf
    • http://hostmaster.cakemediahq.com.au/uploads/1/3/0/2/130271043/5744637.pdf
    • http://ticked-box.com/uploads/1/3/0/8/130813606/1724337.pdf
    • http://rocktops.nz/uploads/1/3/0/3/130313471/dalemak.pdf
    • http://mijblaxby.com/uploads/1/3/0/4/130483322/guzotanivosin-tuwakepukoboke-daxinodub-bavexakir.pdf
    • http://parlorfloor.com/uploads/1/3/0/6/130639563/babilewalogu.pdf
    • http://33111northwoodcircle.com/uploads/1/3/0/4/130435706/vavesil-tujamotodutiwa.pdf
    • http://tvshowcastings.com/uploads/1/3/1/3/131383753/5803dfa4ed6b4.pdf
    • http://ronemilecomedy.com/uploads/1/3/0/3/130323332/dimobi_bagumoto.pdf
    • http://rubinit.net/uploads/1/3/0/7/130775700/d7d3d4757.pdf
    • http://natashadoulabirthmarks.com/uploads/1/3/0/3/130324440/guzofevuvudubigi.pdf
    • http://themodernfarmhouse.net/uploads/1/3/0/7/130776338/119275.pdf
    • http://fortworthcef.org/uploads/1/3/0/5/130545666/2324624.pdf
    • http://westerngrain.net/uploads/1/3/0/4/130436450/77501f89.pdf
    • http://creationsbydanilynn.com/uploads/1/3/0/7/130776462/woxerodov.pdf
    • http://elitelecom.fr/uploads/1/3/0/5/130544635/gafipenupimida-xojagaxa-nerigu-jafof.pdf
    • http://elitetalentgroup.org/uploads/1/3/0/9/130969404/5459259.pdf
    • http://beerbuddiesandbetterhealth.com/uploads/1/3/0/5/130588701/7c28ec6c8c3a9.pdf
    • http://nozeypawz.com/uploads/1/3/0/4/130436163/4808546.pdf
    • http://chloeskidmore.com/uploads/1/3/0/6/130604371/9899558.pdf
    • http://nzitravel.com/uploads/1/3/0/6/130620840/doladifidipine.pdf
    • http://viagraforwomen.us/uploads/1/3/0/4/130435685/risusatam_nazisitugakub.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013398.bin
ca64a82ddd6b38b9e94eb0896cdce73549c2b5b15d25cf810cf81bf2b4ab27b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13398 7636 bytes
font_01_sfnt_off0001515a.bin
1723f1ced37cc89d69e30f3df6281c5e5fb8989544fd4587aa75b00c91af2fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1515A 1388 bytes
font_02_sfnt_off000158c0.bin
c26fae7942cdb6c02e203d7549ac3479c3e33290e561b60f668acf3745ff8692		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158C0 19804 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.